Our prototype for graph sonification was presented on September 26 at the First Conference of the International Association for Cognitive Semiotics (IACS 2014) in Lund, Sweden. You can follow this link to play around with a slightly updated copy of the prototype that we presented.
Other than a couple of bug fixes and a couple of adaptations to make it work under WordPress, this is the same as what was presented at Lund. It will need the full browser window, and as it uses WebAudioAPI it does require a reasonably recent Chrome, Firefox or Safari.